tr4252,

I am not sure I can be of much help to you on this, but from looking at your machine and noticing that there is no adjustment of the "Z" (the grinding wheel), you might have better luck using lathe programming routines to control your machine. Treat the grinding wheel like a lathe tool and treat the blade as if it is round and spinning. Then just program the rouging passes and the finish pass. I'm no CNC Lathe expert, there are probably other who could help more with that, but that's how I would proceed with this.

Jim